ADC12L030 Datasheet | National Semiconductor

Description The ADC12L030 family is 12-bit plus sign successive approximation A/D converters with serial I/O and configurable input multiplexers. These devices are fully tested with a single 3.3V power supply. The ADC12L032, ADC12L034 and ADC12L038 have 2, 4 and 8 channel multiplexers, respectively. Differential multiplexer outputs and A/D inputs are available on the MUXOUT1, MUXOUT2, A/DIN1 and A/DIN2 pins. The ADC12L030 has a two channel multiplexer with the multiplexer outputs and A/D inputs internally connected. On request, these A/Ds go through a self calibration process that adjusts linearity, zero and full-scale errors to less than ± 1⁄2 LSB each. The analog inputs can be configured to operate in various binations of single-ended, differential, or pseudo-differential modes. A fully differential unipolar analog input range (0V to +3.3V) can be acmodated with a single +3.3V supply. In the differential modes, valid outputs are obtained even when the negative inputs are greater than the positive because of the 12-bit plus sign two’s pliment output data format. The serial I/O is configured to ply with NSC’s MICROWIRE™ and Motorola’s SPI standards. For voltage references, see the LM4040 or LM4041 data sheets. Features n 0V to 3.3V analog input range with single 3.3V power supply n Serial I/O ( MICROWIRE and SPI patible) n 2, 4, or 8 channel differential or single-ended multiplexer n Analog input sample/hold function n Power down mode n Variable resolution and conversion rate n Programmable acquisition time n Variable digital output word length and format n No zero or full scale adjustment required n Fully tested and guaranteed with a 2.5V reference n No Missing Codes over temperature Key Specifications n n n n n n n Resolution 12-bit plus sign conversion time 12-bit plus sign sampling rate Integral linearity error Single supply Power dissipation Power down 12-bit plus sign 8.8 µs (min) 73 k Hz (max) ± 1 LSB (max) 3.3V ± 10% 15 m W (max) 40 µW (typ) Applications n...